Osage-orange, Horse-apple, Bois D'Arc, or Bodark (Maclura pomifera) is a small deciduous tree or large shrub, typically growing to tall. It is dioeceous, with male and female flowers on different plants. The fruit, a multiple fruit, is roughly spherical, but bumpy, and 7–15 cm in diameter, and it is filled with a sticky white latex sap. In fall, its color turns a bright yellow-green and it has a faint odor similar to that of oranges. It is not closely related to the citrus fruit called an orange: Maclura belongs to the mulberry family, Moraceae, while oranges belong to the family Rutaceae.
Maclura is closely related to the genus Cudrania, and hybrids between the two genera have been produced. In fact, some botanists recognize a more broadly defined Maclura that includes species previously included in Cudrania and other genera of Moraceae.
Osajin and Pomiferin are flavonoid pigments present in the wood and fruit, comprising about 10% of the fruit's dry weight. The plant also contains the flavonol morin.
Recent research suggests that elemol, another component extractable from the fruit, shows promise as a mosquito repellent with similar activity to DEET in contact and residual repellency.
The leaves are arranged alternately on a slender growing shoot long, varying from dark to pale tender green. In form they are very simple, a long oval terminating in a slender point. In the axil of every growing leaf is found a growing spine which when mature is about long, and rather formidable. The pistillate and staminate flowers are on different trees; both are inconspicuous; but the fruit is very much in evidence. This in size and general appearance resembles a large, yellow green orange; only its surface is roughened and tuberculated. It is, in fact, a compound fruit such as botanists call a syncarp, where the carpels (that is, the ovaries) have grown together and that the great orange-like ball is not one fruit but many. It is heavily charged with milky juice which oozes out at the slightest wounding of the surface. Although the flowering is diœcious, the pistillate tree even when isolated will bear large oranges, perfect to the sight but lacking the seeds.
The heavy, close-grained yellow-orange wood is very dense and is prized for tool handles, treenails, fence posts, electrical insulators, and other applications requiring a strong dimensionally stable wood that withstands rot. Straight-grained osage timber (most is knotty and twisted) makes very good bows. In Arkansas, in the early 19th century, a good Osage bow was worth a horse and a blanket.
Today, the fruit is sometimes used to deter spiders, cockroaches, boxelder bugs, crickets, fleas, and other arthropods. An article posted by the Burke Museum in Washington State claims that this usage, in the case of spiders, has no evidence to support it.
pomifera Category:Trees of Michigan Category:Trees of the United States Category:Trees of Texas
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